27SiMn钢表面激光熔覆304不锈钢数值模拟及实验研究

郭卫; 张亚普; 柴蓉霞; 郭博洋

doi:doi:10.14128/j.cnki.al.20193901.0.5

应用激光, 2019, 39 (1): 35, 网络出版: 2019-04-16

27SiMn钢表面激光熔覆304不锈钢数值模拟及实验研究

Numerical Simulation and Experimental Study of Laser Cladding 304 Stainless Steel on 27SiMn Steel

论文大纲

郭卫 ^*张亚普柴蓉霞郭博洋

作者单位

西安科技大学机械工程学院, 陕西西安 710054

激光熔覆激光功率温度场数值模拟 laser cladding laser power temperature field numerical simulation

摘要

为了研究激光功率对激光熔覆304不锈钢组织和性能的影响, 利用ANSYS有限元分析软件对不同激光功率下的激光熔覆304不锈钢过程进行数值模拟, 分析了不同激光功率下的温度场, 得到了距离熔覆层表面1 mm处的某点温度-时间曲线。在27SiMn钢表面进行了单道激光熔覆304不锈钢实验, 并分析了显微组织、宏观形貌和显微硬度。结果表明, 数值模拟出温度场熔池宽度、深度和面积随激光功率的增大而增大; 该点温度时间曲线呈锯齿状变化, 且最高温度随激光功率的不断增大而增大; 在不同激光功率下熔覆层与基体之间均实现了良好的冶金结合; 激光功率在2 100～2 500 W范围内, 随激光功率的增加, 熔覆层的晶粒变得细小, 组织更为致密; 激光功率在2 700 W时, 熔覆层晶粒比功率为2 500 W的粗大; 显微硬度曲线均呈现出“低—高—低”的台阶状分布趋势。

Abstract

In order to study the effect of laser power on the microstructure and properties of laser cladding 304 stainless steel, the process of laser cladding 304 stainless steel at different laser power was simulated by using ANSYS software. The temperature field under different laser powers was analyzed, and a temperature-time curve at a point 1 mm from the surface of the cladding layer was obtained. A single laser cladding 304 stainless steel experiment was carried out on the surface of 27SiMn steel, and the microstructure, macroscopic morphology and microhardness were analyzed. The results show that the width, depth and area of the temperature field by numerical simulation increase with the increase of laser power. The temperature time cure of this point changes in a sawtooth shape, and the maximum temperature increases with the increase of laser power. Under different laser power, good metallurgical bonding is achieved between the cladding layer and the substrate. The laser power is in the range of 2 100 W to 2 500 W. With the increase of laser power, the grains of the cladding layer become finer and the structure is more compact. When the laser power is 2 700 W, the cladding grain is larger than the power of 2 500 W. The microhardness curves show a step-shaped distribution trend of "low-high-low".

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郭卫, 张亚普, 柴蓉霞, 郭博洋. 27SiMn钢表面激光熔覆304不锈钢数值模拟及实验研究[J]. 应用激光, 2019, 39(1): 35. Guo Wei, Zhang Yapu, Chai Rongxia, Guo Boyang. Numerical Simulation and Experimental Study of Laser Cladding 304 Stainless Steel on 27SiMn Steel[J]. APPLIED LASER, 2019, 39(1): 35.

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